Shuttle-bar mechanism



1929- J. B. KINTZING SHUTTLE BAR MECHANISM Filed May 21, 1925 ill ifr ua Patented Aug. 27, 1929.

UE TED STATES JAMES B. KINTZING, or rmnovnn, rEimsYLvAmA.

SHUTTLE-BAR MECHANISM.

Application filed May 21, 1925. Serial N'o. 31,920.

This invention relates to shuttle bar mechanism of looms andparticularly to looms of the type for making wire cloth. The primarypurpose of the present invention is to provide a latch mechanism for awire cloth loom. which mechanism will have a long period of life. Otherand further objects of the present invention relate to the specificdetails of the mechanism as described'and as recited in the claims.

' In the drawings:

Figure 1 is an elevation partly in section of I the preferred form of myinvention as applied to a wire loom. Figure 2 is a top plan view of theend of the bar.

Figure 3 is a bottom plan view. For many years there has been greattrouble had with the shuttle retaining latches of wire looms, theselatches often wearing out in a week or less. By means of the presentinvention, the latch is given a considerable longevity. In fact, I havefound that latches made in accordance with the present disclosure willcontinue in constant use for more than a year.

In the drawings the usual hollow square shuttle bar is numbered 10 andcarries at its end the customary shuttle guide 11 of standardconstruction. The bar has two small openings therein 12 and 13respectively, the first for the vertical arm of the latch 15, and thesecond, which is nearer the free end of the bar, receives the catch orhook end of the latch. At the far end a casting 16, having a centralorifice 17 to receive loosely the rod 18, is pinned to the shuttle baror otherwise secured to it in a permanent fashion.

The bottom block 20 is preferably a hollow rectangular bearing blockfitting snugly within the shuttle bar against both the bottom thereofand the sides. This bottom block is permanently fastened to the bar,preferably by means of the pin 21, which also serves as a pivot for thelatch 15, which is of such Width as to form a relatively snug fit withthe sides of the central opening in the bottom block. It will be notedfrom the drawings that while the bottom block is in firm engagement withthe bottom of the shuttle bar, the rounded end of the latch clears thebottom by a small amount'to insure freedom of movement of the latch.

A top block rides on the top of the bottom block and has an opening 27with beveled rounded surfaces 28 and 29 to engage the latch to raise andlower it respectively about its pivot 21. The rear end of the top blockis preferably extended to substantially the full size of the bore of theshuttle bar and is. tapped centrally to receive the rod 18, which isthreaded at this end and carries a lock nut 30 to insure exactpositioning of the top block with respect to the latch.

The rod 18 carries a collar 32 pinned to it as at 33. A helical spring35 is confined between the sleeve 36 of the casting 16 and the collar 32and by its action constantly urges the top block forward to bring therounded cam-like surface 29 into engagement with the latch to maintainit in depressed or shuttle-holding position. At its free end the rod 18is threaded as at 40, and on this end is screwed a spool 4L1 between theends of which is received the arms of a fork 42 forming the upper end ofa pawl lever pivoted as at 4 1 to the casting 16 and having a pawl end45, which, at the appropriate time of each stroke, engages the cammingsurface 46 of a block 47 secured in fixed position with re spect to theframe of the loom. By virtue of the threaded engagement of the spool 41and rod 18, the latch may be made to operate at an extremely definitepoint in the cycle, and when such position is found by test the spool 41is locked on the rod 18 by means of the lock nut 50.

The operation of the device is not materially difierent from the oldtype of latch.

The pawl l5'hits the cam 46 causing the fork 42 to move to the left asshown in Figure 1 and compressing the spring 35 and bringing the camsurface 28 of the top block intoengagement with the latch to raise itspoint to free the shuttle. The similar but opposite shuttle bar nowseizes the shuttle and carries it to the other end of the stroke. As theshuttle bar moves in the opposite direction the pawl 45 rides down thecam surface 46 and as soon as it is free the spring 35 restores thelatch to down or locking position, in which position it is resilientlyheld by the spring 35 which yields, however, when the point of theshuttle is received in the end of the shuttle bar.

What I claim is: p

1. In combination a hollow shuttle bar, a bottom block secured therein,a latch, a pin passing thru the shuttle bar, the bottom block and thelatch 'to pivot the latch and to hold thebottom block in position, a topblock slidably mounted within said shuttle bar in operative engagementwith said latch to raise and lower same, and means for moving said topblock to operate the latch.

2. In a shuttle bar mechanism for looms, a hollow tubing shuttle bar, abottom block secured within said bar to strengthen same, a latch pivotedto said bottom block, a top block slidably mounted on said bottom blockand having an opening therein through which said latch passes, a rodsecured to said top block and lying within said shuttle bar, resilientmeans for holding said rod in posi- .tion to lower said latch intoshuttle-holding position, and means located outside of said shuttle barfor moving said rod against said resilient means to raise said latch andfree the shuttle.

8. In a wire loom, a hollow shuttle bar, a hollow rectangular bottomblock, a shuttleholding latch, a single pin securing said bottom blockrigidly within said shuttle bar and pivoting said latch, a top blocklying entirely within said shuttle bar and having an opening thereinthrough which said latch passes in constantly snug engagement, resilientand adjustable means secured to said top block to hold said latchdepressed in shuttle-holding position, and means carried in part by theframe of the loom and in part by the shuttle bar for reciprocating saidtop block with respect to the bottom block to elevate the latch and freethe shuttle.

4:. In a wire loom hollow shuttle mechanism, a shuttle bar, areinforcing element located within said bar, a latch pivoted within saidshuttle bar to said reinforcing element, and a member sliding upon saidelement and holdin same out of contact with the bottom wall of thehollow bar, and having a plurality of latch engaging surfaces.

5. In a loom, a shuttle bar, a latch, a member directly engaging thelatch to raise and lower the latch, and a single means forpivotallysupporting the latch and also holding the latch-engaging memberout of contact with the walls of the shuttle bar.

6. In a loom,a hollow shuttle bar, a pivoted latch, means for raisingand lowering .the latch, and additional means for holding the latchraising and lowering means out of contact with the shuttle bar.

7. In a device of the character described, a piece of tubing, a memberpivoted within the tubing, a reenforcing element engaging the tubingsnugly on opposite sides, and a pin extending thru the tubing and thereenforciug element, serving as afixed pivot forthe member and aspositioning means for the re enforcing element, said reenforcing elementstrengthening the tubing and also serving to keep the pin from bendingwhile being riveted. o

In testimony whereof I affix my signature;

JAMES B. KINTZING.

